The catalog pg_language registers languages in which you can write functions or stored procedures. See

The tcn module provides a trigger function that notifies listeners of changes to any table on which it is attached. It must be used as an

Table 9-59 shows several functions that extract session and system information. In addition to the functions listed in this section, there are

standby_mode (boolean) Specifies whether to start the

The tsm_system_time module provides the table sampling method SYSTEM_TIME, which can be used in the

The catalog pg_opclass defines index access method operator classes. Each operator class defines semantics for index columns of a particular

The catalog pg_rewrite stores rewrite rules for tables and views. Table 50-41

The date/time type inputs are all decoded using the following procedure. Break the input

The process of retrieving or the command to retrieve data from a database is called a query. In SQL the

Namecreateuser -- define a new PostgreSQL user account